AASHTO PP 74-19 describes measuring size and roundness of translucent glass beads used in traffic markings with computerized optical equipment. This practice is intended for glass beads from 0.15 mm to 2.35 mm in diameter.
AASHTO PP 74-19 History
AASHTO PP 74-19
$44.00 $89.00
AASHTO PP 74-13 (2018)
$39.00 $78.00
AASHTO PP 74-13 (2015)
$39.00 $78.00
AASHTO PP 74-12
$25.00 $50.00
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